Scientists searching for extraterrestrial signals are testing an unusual idea: another civilization might choose a ...

Finding a signal from an extraterrestrial civilization takes more than just pointing a telescope in the right direction. We ...

The Alien franchise has made some divisive choices in the 40 years since the release of Aliens in 1986, but this far-reaching fan theory has a fantastic explanation for these controversial events.

The Fermi paradox raises a key question: Given the likelihood of intelligent extraterrestrial life, why is there still no compelling evidence of it? A new theory, described in a paper not yet ...

Everyone loves a good alien invasion story, preferably one with city-sized ships and physics-defying tech. There's just one big problem with that. The Milky Way is estimated to contain 100 to 400 ...